Question

Density is a physical property that relates the mass of a substance to its volume. A. Calculate the density, in g/mL , of a liquid that has a mass of 0.155 g and a volume of 0.000235 L. B. Calculate the volume in milliliters of a 4.71-g sample of a solid with a density of 3.63 g/mL. C. Calculate the mass of a 0.293-mL sample of a liquid with a density of 0.930 g/mL.

Answer 1

Answer:

shape

Explanation:

Answer 2

Answer:

A) 0.660 g/ml

B) 1.297 ml

C) 0.272 g

Explanation:

Every substance, body or material has mass and volume, however the mass of different substances occupy different volumes.  This is where density $D$ appears as a  physical characteristic property of matter that establishes a relationship between the mass $m$ of a body or substance and the volume $V$ it occupies:

$D=\frac{m}{V}$ (1)

Knowing this, let's begin with the answers:

Answer A:

Here the mass is $m=0.155g$ and th volume $V=0.000235L=0.235mL$

Solving (1) with these values:

$D=\frac{0.155g}{0.235mL}$ (2)

$D=0.660g/mL$ (3)

Answer B:

In this case the mass of a sample is $m=4.71g$ and its density is $D=3.63g/mL$.

Isolating $V$ from (1):

$V=\frac{m}{D}$ (4)

$V=\frac{4.71g}{3.63g/mL}$ (5)

$V=1.297mL$ (5)

Answer C:

In this case the volume of a sample is $V=0.293mL$ and its density is $D=0.930g/mL$.

Isolating $m$ from (1):

$m=D.V$ (6)

$m=(0.930g/mL)(0.293mL)$ (7)

$m=0.272g$ (8)